I hope that you've had some luck in tracing Delia. I thought it worth mentioning that Michel, son of Pierre Gelinas dit Lacourse, married three times and had 14 children. Pierre appears in church records as "Gelina Lacourse" elsewhere as simply "Lacourse" (no first name). Michel for some reason, except in his first marriage, suddenly was recorded pretty consistently as "Michel Lina Lacourse" and a couple of his sons, baptized as Lina Lacourse, seem to have remained so. Maybe Gina evolved from Lina?